Writing about those calling for a 'no deal' Brexit, the group said: "They miss the many business and other voices who have made it clear that… (it) would lead to great uncertainty for EU citizens living here and UK citizens living in the EU, higher costs and reduced choice for consumers, disruption at our ports and borders and grave questions about how cross-border contracts are to be fulfilled."

Mrs May maintains that "no deal is better than a bad deal" but hopes the issues of the Irish border, EU citizens and the exit bill can be resolved to commence the second stage of negotiations.